Phospho-alumino-silicate erbium doped fiber for extended l-band amplification

Abstract

Fiber amplifiers for extending their gain bandwidth through an optimization of the host matrix using phosphorus/aluminum (P/Al) as glass modifier are provided. In one aspect, an optical glass fiber comprising an Erbium doped silicate is provided, where the optical glass fiber comprises P 2 O 5 of greater than 6 mol %; and Al 2 O 3 of between 1.5 and 6 mol %, where a molar percent ratio of the P 2 O 5 and the Al 2 O 3 is between 2 and 4. Further, in some cases, use of yttrium as an alternative co-dopant to ytterbium may be used.

1 . An optical glass fiber comprising an Erbium doped silicate, where the optical glass fiber comprises:
 P 2 O 5  of greater than 6 mol %; and   Al 2 O 3  of between 1.5 and 6 mol %,   
       wherein a molar percent ratio of the P 2 O 5  and the Al 2 O 3  is between 2 and 4. 
     
     
         2 . The optical glass fiber of  claim 1 , further comprising:
 Y 2 O 3  of between 0 and 1.1 mol %.   
     
     
         3 . The optical glass fiber of  claim 1 , wherein an Erbium concentration in the Erbium doped silicate is between 1.2×10 25  per m 3  and 2.6×10 25  per m 3 . 
     
     
         4 . The optical glass fiber of  claim 1 , further comprising Yttrium, wherein an Erbium concentration in the Erbium doped silicate is at or below 1.2×10 25  m −3 . 
     
     
         5 . The optical glass fiber of  claim 1 , having the molar percent ratio of the P 2 O 5  and the Al 2 O 3  of about 2.5, an Erbium concentration of about 1.2×10 25 /m 3 , and with about 0.34 mol % of Yttrium. 
     
     
         6 . The optical glass fiber of  claim 1 , further comprising:
 GeO 2  of between 0 and 6.1 mol %.   
     
     
         7 . The use of the optical glass fiber of  claim 1  in a Long Wavelength band amplifier. 
     
     
         8 . The use of the optical glass fiber of  claim 7 , wherein the optical glass fiber is capable of amplification up to a wavelength of 1626 nm. 
     
     
         9 . An optical glass fiber comprising an Erbium doped silicate, where the optical glass fiber comprises:
 P 2 O 5  of greater than 6 mol %; and   Al 2 O 3  of between 1.5 and 6 mol %,   
       wherein a molar percent ratio of the P 2 O 5  and the Al 2 O 3  is between 1.1 and 5.5. 
     
     
         10 . The optical glass fiber of  claim 9 , further comprising:
 Y 2 O 3  of between 0 and 1.1 mol %.   
     
     
         11 . The optical glass fiber of  claim 9 , wherein an Erbium concentration in the Erbium doped silicate is between 1.2×10 25  per m 3  and 2.6×10 25  per m 3 . 
     
     
         12 . The optical glass fiber of  claim 9 , further comprising Yttrium, wherein an Erbium concentration in the Erbium doped silicate is at or below 1.2×10 25  m −3 . 
     
     
         13 . The optical glass fiber of  claim 9 , having the molar percent ratio of the P 2 O 5  and the Al 2 O 3  of about 2.5, an Erbium concentration of about 1.2×10 25 /m 3 , and with about 0.34 mol % of Yttrium. 
     
     
         14 . The optical glass fiber of  claim 9 , further comprising:
 GeO 2  of between 0 and 6.1 mol %.